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Calendar
hole will go live in approximately
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. Why not try and solve it ahead of time?
Recent Solutions
Achievements
Cheevos
Golfers
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All Holes
12 Days of Christmas
24 Game
99 Bottles of Beer
Abundant Numbers
Abundant Numbers (Long)
Arabic to Roman
Arithmetic Numbers
Arrows
Ascending Primes
ASCII Table
Billiards
brainfuck
Card Number Validation
Catalan Numbers
Catalan’s Constant
Christmas Trees
Collatz
CSS Colors
Cubes
Day of Week
DFA Simulator
Diamonds
Divisors
Emirp Numbers
Emirp Numbers (Long)
Emojify
Evil Numbers
Evil Numbers (Long)
Factorial Factorisation
Farey Sequence
Fibonacci
Fizz Buzz
Foo Fizz Buzz Bar
Forsyth–Edwards Notation
Fractions
Game of Life
Gijswijt’s Sequence
Happy Numbers
Happy Numbers (Long)
Hexdump
Hilbert Curve
Intersection
Inventory Sequence
ISBN
Jacobi Symbol
Kaprekar Numbers
Kolakoski Constant
Kolakoski Sequence
Leap Years
Levenshtein Distance
Leyland Numbers
ln 2
Look and Say
Lucky Numbers
Lucky Tickets
Mahjong
Mandelbrot
Maze
Medal Tally
Minesweeper
Morse Decoder
Morse Encoder
Musical Chords
N Queens
Niven Numbers
Niven Numbers (Long)
Number Spiral
Odious Numbers
Odious Numbers (Long)
Ordinal Numbers
PalindromemordnilaP
Pangram Grep
Partition Numbers
Pascal’s Triangle
Pernicious Numbers
Pernicious Numbers (Long)
Poker
Polyominoes
Prime Numbers
Prime Numbers (Long)
Proximity Grid
QR Decoder
Quine
Recamán
Repeating Decimals
Reverse Polish Notation
Reversi
Rijndael S-box
Rock-paper-scissors-Spock-lizard
Roman to Arabic
ROT13
Rule 110
Scrambled Sort
Set
Seven Segment
SI Units
Sierpiński Triangle
Smith Numbers
Spelling Numbers
Star Wars GPT
Star Wars Opening Crawl
Sudoku
Sudoku (Fill-in)
Ten-pin Bowling
Tic-tac-toe
Time Distance
Tongue-twisters
Topological Sort
Tower of Hanoi
Transpose Sentence
Trinomial Triangle
United States
Vampire Numbers
Van Eck Sequence
Zeckendorf Representation
Zodiac Signs
γ
λ
π
τ
φ
√2
𝑒
Apéry’s Constant
Binary Lambda Calculus
Calendar
Connect Four
Continued Fractions
Crossword
CSS Colors (Inverse)
CSS Grid
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Gray Code Decoder
Gray Code Encoder
Hexagonal Spiral
Highly Composite Numbers
Multitap Input
NFA Simulator
Numbrix
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Taxicab Numbers
Turtle
Tutorial
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><>
Assembly
AWK
Bash
BASIC
Berry
brainfuck
C
C#
C++
Civet
Clojure
COBOL
Coconut
Common Lisp
Crystal
D
Dart
Elixir
Erlang
F#
Factor
Forth
Fortran
Gleam
Go
GolfScript
Groovy
Haskell
Hexagony
J
Janet
Java
JavaScript
jq
Julia
K
Kotlin
Lua
Nim
OCaml
Pascal
Perl
PHP
PowerShell
Prolog
Python
R
Raku
Rockstar
Ruby
Rust
Scheme
sed
SQL
Swift
Tcl
TeX
V
VimL
Wren
Zig
Experimental Language
05AB1E
ALGOL 68
APL
Arturo
Befunge
BQN
CJam
CoffeeScript
Egel
Fennel
Harbour
Hare
Haxe
Hush
Hy
iogii
Knight
Luau
Odin
Picat
Qore
Racket
Rebol
Rexx
Scala
Squirrel
Stax
Uiua
Umka
Vala
Vyxal
Hole
All
12 Days of Christmas
24 Game
99 Bottles of Beer
Abundant Numbers
Abundant Numbers (Long)
Arabic to Roman
Arithmetic Numbers
Arrows
Ascending Primes
ASCII Table
Billiards
brainfuck
Card Number Validation
Catalan Numbers
Catalan’s Constant
Christmas Trees
Collatz
CSS Colors
Cubes
Day of Week
DFA Simulator
Diamonds
Divisors
Emirp Numbers
Emirp Numbers (Long)
Emojify
Evil Numbers
Evil Numbers (Long)
Factorial Factorisation
Farey Sequence
Fibonacci
Fizz Buzz
Foo Fizz Buzz Bar
Forsyth–Edwards Notation
Fractions
Game of Life
Gijswijt’s Sequence
Happy Numbers
Happy Numbers (Long)
Hexdump
Hilbert Curve
Intersection
Inventory Sequence
ISBN
Jacobi Symbol
Kaprekar Numbers
Kolakoski Constant
Kolakoski Sequence
Leap Years
Levenshtein Distance
Leyland Numbers
ln 2
Look and Say
Lucky Numbers
Lucky Tickets
Mahjong
Mandelbrot
Maze
Medal Tally
Minesweeper
Morse Decoder
Morse Encoder
Musical Chords
N Queens
Niven Numbers
Niven Numbers (Long)
Number Spiral
Odious Numbers
Odious Numbers (Long)
Ordinal Numbers
PalindromemordnilaP
Pangram Grep
Partition Numbers
Pascal’s Triangle
Pernicious Numbers
Pernicious Numbers (Long)
Poker
Polyominoes
Prime Numbers
Prime Numbers (Long)
Proximity Grid
QR Decoder
Quine
Recamán
Repeating Decimals
Reverse Polish Notation
Reversi
Rijndael S-box
Rock-paper-scissors-Spock-lizard
Roman to Arabic
ROT13
Rule 110
Scrambled Sort
Set
Seven Segment
SI Units
Sierpiński Triangle
Smith Numbers
Spelling Numbers
Star Wars GPT
Star Wars Opening Crawl
Sudoku
Sudoku (Fill-in)
Ten-pin Bowling
Tic-tac-toe
Time Distance
Tongue-twisters
Topological Sort
Tower of Hanoi
Transpose Sentence
Trinomial Triangle
United States
Vampire Numbers
Van Eck Sequence
Zeckendorf Representation
Zodiac Signs
γ
λ
π
τ
φ
√2
𝑒
Experimental Hole
Apéry’s Constant
Binary Lambda Calculus
Calendar
Connect Four
Continued Fractions
Crossword
CSS Colors (Inverse)
CSS Grid
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Gray Code Decoder
Gray Code Encoder
Hexagonal Spiral
Highly Composite Numbers
Multitap Input
NFA Simulator
Numbrix
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Taxicab Numbers
Turtle
Tutorial
Hole
Golfer
Bytes
Time
Submitted
Hexagonal Spiral
bitsandbeyond
272
1,326ms
14 mins ago
Rijndael S-box
bitsandbeyond
🥈
140
1,388ms
3 days ago
Trinomial Triangle
edsrzf
💎
95
1,301ms
3 days ago
Tower of Hanoi
JayXon
💎
64
1,334ms
4 days ago
Lucky Tickets
MeWhenI
2,450
1,443ms
5 days ago
Pangram Grep
kmathis22
237
1,573ms
6 days ago
γ
JOrE20
1,069
1,364ms
9 days ago
Fizz Buzz
mwarvik
111
1,118ms
10 days ago
Fizz Buzz
amazingalek
111
1,154ms
10 days ago
Minesweeper
scpchicken
1,272
1,343ms
10 days ago
Abundant Numbers
DialFrost
73
1,229ms
11 days ago
Musical Chords
JOrE20
5,000
1,347ms
16 days ago
Odious Numbers
snoozingnewt
50
1,127ms
16 days ago
Niven Numbers (Long)
snoozingnewt
78
1,220ms
16 days ago
Arrows
snoozingnewt
🥉
162
1,389ms
16 days ago
λ
edsrzf
🥉
229
1,463ms
18 days ago
Pangram Grep
ndren
631
1,404ms
19 days ago
Scrambled Sort
snoozingnewt
127
1,357ms
20 days ago
Hexagonal Spiral
HumanoidCPU
1,342
1,258ms
21 days ago
Tower of Hanoi
JDiLenarda
313
1,378ms
21 days ago
Divisors
snoozingnewt
66
1,274ms
22 days ago
Niven Numbers
snoozingnewt
🥇
48
1,298ms
22 days ago
Tongue-twisters
prestosilver
555
1,218ms
23 days ago
Catalan Numbers
snoozingnewt
55
1,268ms
23 days ago
Tower of Hanoi
sean-niemann
67
1,225ms
24 days ago
Tower of Hanoi
CaedenHarper
3,584
1,233ms
24 days ago
Spelling Numbers
dokutan
1,149
1,334ms
25 days ago
Lucky Tickets
dokutan
4,776
1,351ms
25 days ago
Tower of Hanoi
edsrzf
🥈
66
1,434ms
25 days ago
Happy Numbers
snoozingnewt
🥇
66
1,470ms
25 days ago
Van Eck Sequence
KatieLG
1,677
1,219ms
26 days ago
Vampire Numbers
KatieLG
1,040
1,232ms
26 days ago
Trinomial Triangle
KatieLG
1,833
1,244ms
26 days ago
Tongue-twisters
KatieLG
499
1,316ms
26 days ago
Smith Numbers
KatieLG
1,643
1,240ms
26 days ago
Sierpiński Triangle
KatieLG
227
1,237ms
26 days ago
Rule 110
KatieLG
2,042
1,235ms
26 days ago
Recamán
KatieLG
807
1,269ms
26 days ago
Prime Numbers (Long)
KatieLG
4,248
1,278ms
26 days ago
Polyominoes
KatieLG
1,338
1,246ms
26 days ago
Pernicious Numbers (Long)
KatieLG
14,044
1,324ms
26 days ago
Pascal’s Triangle
KatieLG
696
1,242ms
26 days ago
Odious Numbers (Long)
KatieLG
1,658
1,223ms
26 days ago
Niven Numbers (Long)
KatieLG
5,514
1,245ms
26 days ago
N Queens
KatieLG
🥉
1,178
1,233ms
26 days ago
Mandelbrot
KatieLG
587
1,256ms
26 days ago
Lucky Numbers
KatieLG
3,682
1,272ms
26 days ago
Look and Say
KatieLG
703
1,264ms
26 days ago
Leap Years
KatieLG
601
1,297ms
26 days ago
Kolakoski Sequence
KatieLG
343
1,258ms
26 days ago
Inventory Sequence
KatieLG
1,717
1,232ms
26 days ago
Hilbert Curve
KatieLG
908
1,231ms
26 days ago
Gijswijt’s Sequence
KatieLG
249
1,255ms
26 days ago
Foo Fizz Buzz Bar
KatieLG
1,521
1,280ms
26 days ago
Fizz Buzz
KatieLG
281
1,290ms
26 days ago
Farey Sequence
KatieLG
2,858
1,292ms
26 days ago
Factorial Factorisation
KatieLG
🥉
807
1,266ms
26 days ago
Evil Numbers (Long)
KatieLG
1,662
1,275ms
26 days ago
Emirp Numbers (Long)
KatieLG
1,018
1,270ms
26 days ago
Divisors
KatieLG
837
1,301ms
26 days ago
Diamonds
KatieLG
389
1,284ms
26 days ago
Cubes
KatieLG
843
1,288ms
26 days ago
Collatz
KatieLG
2,177
1,289ms
26 days ago
Christmas Trees
KatieLG
307
1,305ms
26 days ago
Catalan Numbers
KatieLG
2,622
1,300ms
26 days ago
Ascending Primes
KatieLG
456
1,245ms
26 days ago
Arithmetic Numbers
KatieLG
24,659
1,289ms
26 days ago
Abundant Numbers (Long)
KatieLG
842
1,244ms
26 days ago
99 Bottles of Beer
KatieLG
1,285
1,249ms
26 days ago
24 Game
KatieLG
5,079
1,280ms
26 days ago
12 Days of Christmas
KatieLG
2,073
1,286ms
26 days ago
Tower of Hanoi
KatieLG
3,585
1,214ms
26 days ago
Tower of Hanoi
HumanoidCPU
166
1,354ms
27 days ago
Star Wars GPT
albanian-laundromat
🥈
383
1,387ms
28 Nov 2025
Tower of Hanoi
dokutan
3,584
1,242ms
28 Nov 2025
Taxicab Numbers
HumanoidCPU
4,167
1,167ms
27 Nov 2025
Fibonacci
Andrey2001
73
1,211ms
26 Nov 2025
Musical Chords
AidanWalter
1,989
1,372ms
26 Nov 2025
Minesweeper
AidanWalter
1,559
1,350ms
26 Nov 2025
Taxicab Numbers
Shanethegamer
4,167
1,220ms
26 Nov 2025